JP2001140856A - Laminated roller and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated roller reconciling a good permanent compressive strain characteristic and hardness, abrasion resistance, electric conductivity, and pollution resistance and to provide its manufacturing method by arranging an elastic body layer for a shaft, then forming a continuous metal layer on the outer surface of the elastic body layer by plating, and laminating the elastic body layer and the metal layer. SOLUTION: A conductive cover layer is formed with the metal layer made of a selected specific metal and a catalyst metal depositing the metal layer from this metal on the elastic body layer around the shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated roller and a method for manufacturing the same, and more particularly, to a laminated roller and a metal layer, in which a high nip property and a high wear resistance are achieved at the same time. The present invention relates to a laminated roller suitable for office equipment and a method for manufacturing the same.

[0002]

2. Description of the Related Art Various cylindrical conveying parts (hereinafter referred to as "rollers") are used in office equipment such as copiers, printers, and facsimile machines for recording characters and images on paper or other recording media by electrostatography. It is used. These rollers are manufactured by forming an elastic member such as rubber in a cylindrical shape on a shaft serving as a core material, or by subjecting an outer peripheral surface of the shaft to a surface treatment with an inorganic material or an organic material. The types of these rollers include, for example, respective rollers for feeding, transporting, and discharging paper provided in a transport system of paper as a recording medium, a photosensitive drum, and charging, developing, and supplying toner to the photosensitive member. Each roller includes a transfer roller for transferring the toner to a print medium and removing residual toner, and a fixing roller.

[0003] These rollers are made of an elastic member as a roller body disposed around a shaft, or an inorganic or organic material coated on the surface of the shaft, depending on the physical properties required for the various uses described above. Appropriate selections have been made. For example, in order to convey a recording medium, a flexible elastic layer made of rubber or the like is formed on the outer peripheral surface of the shaft, and a high frictional force is generated due to the contact area and elastic hysteresis loss due to deformation of the elastic layer. Rollers are used. In a developing roller to which toner is attached by static electricity, the voltage between the shaft and the surface of the elastic layer is controlled by giving the elastic layer an appropriate electric resistance value. Further, as the organic photoconductor drum, a photoconductor resin coated on the outer peripheral surface of a metal shaft is preferably used.

[0004]

A shaft in which a flexible elastic layer is provided on the outer peripheral surface of the shaft makes soft contact with an object with a large apparent contact area, but has a hardness, abrasion resistance, electric conductivity and contamination resistance. Inferior to metal in properties and the like. Not only EPDM (Ethylene Propylene Diene Terpolymer) rollers, which are used as standard in office equipment, but also urethane rollers, which have excellent abrasion resistance among elastic materials, can be used as paper recording media. When the paper is conveyed, it is worn over time by rubbing against the edge portion of the paper, and the durable life has its own limit. In addition, the plasticizer, process oil and other unreacted monomers contained in the entire elastic layer migrate to the outer surface of the elastic layer and contaminate the recording medium and the organic photoreceptor. This also shortens the durable life of office equipment.

When a metal shaft is coated with an inorganic or organic material, the contact with an object is localized, so that the roller for conveying the recording medium has a non-uniform frictional force. As a result, the feeding of the recording medium becomes inaccurate, and the contact of the charging roller with the photoreceptor becomes unstable, so that a stable discharge region cannot be formed. Further, when the toner adhered on the photoreceptor is used as a roller for transferring the toner to a recording medium, it is pointed out that excessive pressure acts on the toner to cause poor transfer to the recording medium (so-called hollowing out).

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems inherent in prior art rollers for office equipment and a method of manufacturing the same.
In order to solve this problem, it is proposed to provide an elastic layer on the shaft, and then form a continuous metal layer on the outer surface of the elastic layer by plating to form the elastic layer and By laminating the metal layers, the elastic body is largely depressed by a small pressure (nip pressure), and has good permanent compression strain characteristics in which the elasticity recovers even after repeated use, and the hardness and abrasion resistance of the metal. It is an object of the present invention to obtain a laminated roller having a balance between the properties, electrical conductivity, and contamination resistance.

[0007]

In order to overcome the above-mentioned problems and achieve the intended object, a laminated roller according to the present invention comprises an elastic layer formed in a columnar shape around a shaft serving as a core material of the roller. And a conductive coating layer provided on the outer peripheral surface of the elastic layer, wherein the conductive coating layer is made of a selected specific metal, and a metal layer located at the outermost side, And a catalyst metal that is present on the outer peripheral surface and deposits the metal layer from the metal.

In order to overcome the above problems and achieve the intended object, a method of manufacturing a laminated roller according to another invention of the present application comprises forming a columnar elastic layer around a shaft serving as a core material of the roller. Forming a resin layer on the outer surface of the elastic layer, applying a catalyst metal for depositing the selected specific metal to the resin layer, and then performing plating to deposit the metal on the catalyst metal. In this case, the metal layer is formed.

In order to overcome the above-mentioned problems and achieve the intended object, a method of manufacturing a laminated roller according to still another aspect of the present invention comprises forming a columnar elastic layer around a shaft serving as a core material of the roller. Then, on the outer surface of the elastic layer, a resin layer containing a catalyst metal for depositing a selected specific metal is formed in a dispersed state, and then subjected to plating to deposit the metal on the catalyst metal. In this case, the metal layer is formed.

In order to overcome the above problems and achieve the intended object, a method of manufacturing a laminated roller according to still another invention of the present application is to form a cylindrical elastic layer around a shaft serving as a core material of the roller. Then, a resin layer of a synthetic resin that can be plated is formed on the outer surface of the elastic layer, and after performing a roughening treatment on the outer surface of the resin layer, a catalytic activity is exerted on a selected specific metal. The metal layer is formed by depositing the metal on the catalyst metal layer by applying a catalyst metal layer to be formed and then performing a plating process.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a laminated roller and a method of manufacturing the same according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. The inventor of the present application has made it difficult or impossible to apply a metal layer by plating or the like so far, to an elastic body made of an elastomeric material such as urethane foam having excellent properties as an elastic body, silicone rubber, or another material. It has been found that by applying a resin component such as a resin and a catalytic metal in the pretreatment step, it is possible to perform metal plating with very uniform and high adhesion. In addition, when applying a resin component, a catalyst metal or the like and metal plating, a predetermined masking is applied to the vicinity of both ends of the roller to prevent deposition of a metal layer near the both ends, so that cracks and the like from the vicinity of both ends are obtained. It was also confirmed that the peeling of the metal layer accompanying the occurrence of the metal layer could be prevented.

[0012]

First Embodiment Roller 10 for office equipment according to the present invention
As shown in FIG. 1, a shaft 12 serving as a core material of the roller 10, a cylindrical porous elastic layer 14 covering the outer peripheral surface of the shaft 12, a whole outer surface of the elastic layer And a conductive coating layer 16 covering the portion. The conductive coating layer 16 includes a resin layer 18 formed of a resin 30 and having a characteristic of adsorbing a catalyst metal 32 described later, a catalyst metal layer 20 adsorbed on the resin layer 18, and a catalyst metal layer 20. And the metal layer 22 formed on the outermost side with the fine particles of the catalyst metal 32 forming the core as cores. The conductive film 16 has a structure in which a catalytic metal layer 20 is formed on the resin layer 18 and a metal layer 22 is further laminated, and as shown in FIG.
The resin layer 18 in which the catalyst metal 32 is contained in the resin 30 in a dispersed state may be formed so as to have the function of the above. These layers are formed by the elastic layer 14, the resin layer 18, the (catalytic metal layer 20) and the metal layer 22 from the shaft 12 side.
Are stacked in this order. Here, since the resin layer 18 and the conductive coating layer 16 are thin and very flexible, characteristics such as flexibility of the elastic layer 14 are not impaired.

As the shaft 12, a material used for a normal roller shaft, such as a general steel material subjected to nickel electroless plating or the like, a stainless steel or an aluminum alloy is used. In addition to a solid shaft, a hollow pipe-shaped shaft may be used.

The elastic material forming the elastic material layer 14 includes EPDM, SBR, NBR, CR, epichlorohydrin rubber, acrylic rubber, silicone rubber, fluorine rubber, polyurethane, polyurea, thermoplastic olefin-based elastomer, and mature plastic styrene-based. Solid or porous rubber or elastomer such as elastomer, matured plastic ester elastomer, matured polyamide elastomer, heatable polyurethane elastomer, thermoplastic vinyl chloride elastomer or thermoplastic fluoroelastomer is used for the type of roller to be manufactured. They are selected and used as appropriate. When molded into a roller, its ASKER rubber hardness is 1C
Those having a diameter of up to 70 A are preferably used.

The resin 30 forming the resin layer 18 is roughly classified into the following three types, and is applied to the surface of the elastic layer 14 by a method such as spraying. These resins 30 according to 1 to 3 to be described later are appropriately selectively used depending on the type of the elastic layer 14.

1: Moisture-curable resin A typical example is a moisture-curable modified silicone resin or cyanoacrylate. These moisture-curable resins generally have high viscosity but can be adjusted in concentration with a solvent such as xylene, so that a uniform and thin resin layer 18 can be easily formed. In addition, since the curing is performed by the atmospheric humidity, the curing speed can be easily controlled by controlling the moisture applied to the elastic layer 14. The moisture-curable resin has a high physical bonding ability to various substances, and a large number of functional groups newly generated by a reaction with moisture or functional groups remaining in the structure in an unreacted state after curing. It is presumed that the group indirectly expresses strong adhesion to the metal layer 22 by capturing and adsorbing a large number of the catalyst metals 32, and is particularly suitable for silicone rubber and the like.

2: Synthetic resin latex A polymer aqueous dispersion (latex or emulsion) containing a hydrophilic group or a hydrophilic segment in the polymer skeleton and having a predetermined dispersion stability in water. Those having are generally referred to. In particular, as the hydrophilic group, an ionic functional group such as a carboxyl group, a sulfone group, or a quaternary ammonium base having an ionic property, which is opposite to a surfactant used at the time of preparing a catalytic metal colloid described below, is suitable. In this case, the catalytic metal colloid is uniformly and stably adsorbed on the base material by the attraction force acting ionically (electrically). As another condition, by drying performed subsequent to the application on the base material, a film is easily formed to exhibit high adhesion to the base material, and the electroless and electrolytic plating steps described below are performed. It is required to have resistance to an alkaline atmosphere and to have heat resistance and the like expected during actual use, and further versatility is realized by providing these conditions. Examples of such a synthetic resin elastomer include a urethane resin, an acrylic resin, a carboxylated styrene-butadiene rubber and a carboxylated methyl methacrylate-butadiene rubber.

3: Synthetic resin that can be plated by a conventional plastic plating method Such a resin includes ABS (acrylonitrile.
Butadiene / styrene resin), PC (polycarbonate resin), PC / ABS (alloy of PC and ABS), PA (polyamide resin), PPS (polyphenylene sulfide resin), PES (polyether sulfone resin), PEI (polyether) Imide resin), PPO (modified polyphenylene oxide resin), POM (polyoxymethylene resin), P
Examples thereof include P (polypropylene resin), PBT (polybutylene terephthalate resin), and ethoxy resin, and a mixture obtained by mixing a predetermined amount of a flame retardant with the flame retardant is provided for use. It should be noted that a pretreatment method including a mechanical or chemical roughening step corresponding to each material is established for the resin layer 18 formed of the synthetic resin that can be plated.

As the catalyst metal 32 contained in the resin layer 18 or forming the catalyst metal layer 20, a noble metal having catalytic activity in a plating reaction such as palladium is suitably used. In addition, gold, silver, ruthenium , Rhodium, palladium, iridium, osmium or platinum.
The catalyst metal 32 is contained in the resin 30 in a dispersed state and is provided on the elastic layer 14 (see FIG. 2), or the resin layer 18 and the catalyst metal layer 20 are laminated and individually formed by a method described later. (See FIG. 1). When the resin layer 18 and the catalytic metal layer 20 are laminated, there is a difference between using a moisture-curable resin or a synthetic resin latex, or using a synthetic resin that can be plated by a conventional plastic plating method. The catalyst metal layer 20 does not need to be formed as a continuous layer, but only needs to be adsorbed on the resin layer 18 and act as a nucleus when depositing a metal layer 22 described later.

As the metal 34, copper, nickel,
Examples include iron, cobalt, chromium, zinc, tin, lead, aluminum, gold, silver, and palladium. These metals are applied to the catalytic metal layer 20 by a wet plating method using a plating bath (electroless plating alone or a combination of electroless plating and electrolytic plating).
2 is deposited. Especially in terms of cost and stability,
The use of copper or nickel alone or in a laminate is preferred.

[0021]

The manufacturing method of the first embodiment The manufacturing method of the laminated roller according to the first embodiment of the present invention is largely divided into a pretreatment step S1, a conductive step S2 and a finishing step S3 as shown in FIGS. . The pre-processing step S1 is an essential step for forming the desired elastic layer 14 into the cylindrical shape on the shaft 12 in an elastic layer forming step S11 and for applying metal plating to the elastic layer 14 which is an electrically non-conductive material. And a primer application step S12 for applying a suitable resin 30 and a catalyst metal 32.
When the resin layer 18 and the catalyst metal layer 20 are laminated, the primer application step S12 is further divided into two steps of a resin application step S121 and a catalyst adsorption step S122. If it is contained in a dispersed state, it consists only of the resin application step S121.

The conductive step S2, which is performed subsequent to the pretreatment step S1, is a plating bath 4 that is selectively used as appropriate.
0, the catalyst metal layer 20 (resin layer 1
8) An electroless plating application step S21 for applying a metal layer 22 having a predetermined thickness on the top, and an electroplating application step S22 that is selectively performed as appropriate. After the above steps, processing and inspection in the inspection process S3 are performed.
The lamination of the elastic layer and the metal layer is completed.

In the elastic layer forming step S11, a columnar elastic layer 14 is manufactured and formed around the shaft 12 (see FIG. 4A). The manufacturing method is as follows. A method in which a molding die having a cylindrical cavity is filled with a liquid raw material such as polyurethane or an elastic raw material such as rubber or thermoplastic elastomer, foamed, cured, cooled, and then taken out to obtain a cylindrical elastic body. . This method is carried out by, for example, an injection mold, a transfer mold, a press mold, or the like. In this case, the shaft of the roller is formed integrally, or is attached after molding by bonding or press fitting. The outer diameter is adjusted by polishing the surface as necessary. A block-like elastic body is manufactured in advance using a polyurethane foam or the like, and a shaft is attached to the elastic body by a method such as press fitting. Then, while rotating the block-like elastic body, the roller body is heated and melted by, for example, a nichrome wire heater and then polished to produce a roller body.
As disclosed in Japanese Patent No. 04937, a method of manufacturing a roller body by pressing a cutter against a rotating elastic body to perform peeling. A method for producing a tubular roller body by extrusion foaming using a rubber or a thermoplastic elastomer containing a foaming agent as a raw material. In this case, attach the shaft after molding,
If necessary, the outer periphery of the roller is polished to adjust the outer diameter. As disclosed in Japanese Patent Application Laid-Open No. 7-76049, while rotating a cylindrical or cylindrical roller base material, a liquid material for room-temperature-curable silicone rubber foam is applied to the roller base material by an applicator disposed outside thereof. A method in which a sponge roller is obtained by applying an outer peripheral surface to a certain thickness and foaming and curing the obtained coating film. The elastic body constituting the roller is manufactured as a long strip of silicone sponge, for example, and the elastic body is helically wound around the outer circumference of the shaft until a required thickness is reached, and then the outer circumference of the cylindrical main body is formed. A method of obtaining a roller having a desired diameter by polishing a portion (JP-A-8-6417). The above method is appropriately selected in consideration of the raw material of the roller and the intended use. The thickness of the elastic layer formed by these manufacturing methods is preferably about 1 to 100 mm, and both ends of the shaft 12 are trimmed to a required roller length.

In the case where the primer application step S12 comprises two steps, the resin application step S121 and the catalyst adsorption step S122, the resin (moisture curable resin, synthetic resin latex or conventional plastic) applied in the resin application step S12 is used. Differences in the following manufacturing steps occur due to differences in the resin that can be plated by the plating method), and each will be described separately. The thickness of the resin layer 18 and the catalytic metal layer 20 formed here is preferably up to about 0.1 mm which does not hinder the elastic deformation of the elastic layer 14, and only on the outer peripheral surface of the elastic layer 14. Will be applied.

1: In the case of a primer application step of forming a resin layer from a moisture-curable resin Resin application step S121: Since the viscosity of the moisture-curable resin is high as described above, application by a roll coater or the like is suitable. However, spray coating or brush coating can also be used. Catalyst adsorption step S122: A colloid of the catalyst metal 32 having a catalytic property for the electroless reaction is applied and adsorbed on the surface of the resin layer 18 by a method such as immersion, spray coating or brush coating. The colloid of the catalyst metal 32 is obtained by dissolving a water-soluble salt of the catalyst metal compound, adding a surfactant, and adding a reducing agent while stirring vigorously. Although there are various surfactants, anionic or cationic surfactants are preferable, and examples thereof include soap, higher alcohol sodium sulfate, sodium alkylbenzene sulfonate, sodium polyoxyethylene alkyl ether sulfate, and lauryl. Trimethylammonium chloride or alkylbenzyldimethylammonium chloride is used.

2: In the case of a primer application step of forming a resin layer from a synthetic resin latex Resin application step S121: The synthetic resin latex is made of a material such as a plastic which dissolves in various solvents such as a thinner in order to use water as a dispersion medium. Is also applicable, and the environmental load in the pretreatment step is low. Furthermore, since it has a low viscosity and can be treated in the same manner as water, it can be applied to a substrate by immersion. Catalyst adsorbing step S122: 1: In the case of a primer applying step of forming a resin layer from a moisture-curable resin, it is the same as the catalyst adsorbing step S122 described in.

3: In the case of a primer applying step of forming a resin layer from a synthetic resin that can be plated by a conventional plastic plating method. Resin applying step S121: The surface of the elastic layer 14 is thinly coated with a synthetic resin that can be plated. For this coating, a coating method in which the resin is dissolved and applied by means such as spraying or brushing, and while the resin is melted by an extruder and extruded into a film or tube, the coating is applied to the surface of the elastic layer 14. A so-called extrusion coating method to be applied can be used. In the case of the coating method, the resin layer 18 is formed only near the surface by adjusting the viscosity to a high value while paying attention to the porous property of the elastic layer 14. Catalyst adsorption step S122: First, washing is performed with an alkaline aqueous solution in order to remove oily stains and the like at the time of molding the surface portion of the elastic layer 14. This alkaline aqueous solution usually contains sodium phosphate or a nonionic surfactant which facilitates catalyst adsorption. Next, a chemical roughening method corresponding to the type of the resin is performed. For example, in the case of an ABS resin, it is immersed in a high-concentration solution of chromic anhydride and sulfuric acid at a high temperature to dissolve the butadiene rubber phase, thereby forming a fine uneven structure on the surface and roughening the surface. It is performed by adding a group. In the case of PC, prior to the etching with the mixed solution of chromic acid and sulfuric acid, a method of dipping in an organic solvent to swell and roughen the resin surface by forming cracks due to stress generation is preferably employed. For PA, it is common to add a filler and etch with concentrated hydrochloric acid. After the etching is completed, the complex salt colloid consisting of tin and palladium chloride is finally adsorbed on the roughened surface, and then dipped in an accelerator bath containing sulfuric acid to adsorb only the palladium metal nucleus on the surface. Thus, the catalyst metal layer 20 is formed.

The roller is manufactured by preparing the resin layer 18 and the catalyst metal layer 20 formed through the above-described primer application step S12 as a tube-like material in a separate process in advance and filling the outer periphery of the elastic layer 14 with the roller. May be. Specifically, the elastic layer 14 is placed in a predetermined vacuum state,
Shrink its diameter. Then, the elastic layer 14 in the contracted state is inserted into a resin layer 18 formed in a tube having a predetermined diameter and manufactured in advance in another step. Since the diameter of the elastic layer 14 in a state where the diameter is contracted is gradually restored by returning to the normal pressure, the elastic layer 14 and the resin layer 18 are tightly integrated with each other.

After forming a suitable resin layer 18 on the elastic layer 14 and then adsorbing the catalyst metal layer 20, a primer application step S 11 of applying these together as a resin layer 18 will be described in the following. The methods disclosed in the art can also be used. That is, the substance having the function as the resin 30 is added to the substance having the function as the catalytic metal layer 32 to be provided as a single layer.・ A paint containing chitosan or a chitosan derivative disclosed in Japanese Patent Publication No. Hei 6-33461 is applied, and a stannous chloride solution and a palladium chloride solution are successively injected and discharged to be adsorbed. . A stannous chloride-containing emulsion paint disclosed in Japanese Patent Publication No. 7-49627 is applied and dried, and a hydrochloric acid-acidic palladium chloride solution is injected and absorbed. An acrylonitrile-based paint containing a metal salt which exhibits a catalytic action of an electroless plating reaction by reduction, which is disclosed in JP-A-5-331683, is applied, dried, adsorbed by a reduction treatment. A method in which a non-conductive powder filler having atomic elastic palladium supported on an elastic body surface, which is disclosed in Japanese Patent Application Laid-Open No. 9-59778, is applied and adsorbed by applying a coating material dispersed in an organic binder. A paint containing a composite metal oxide hydrate filler composed of palladium and titanium, disclosed in JP-A-9-135097, is applied, dried and adsorbed, and activated using sulfuric acid as an accelerator. .

In the electroless plating step S21 in the electroconductive step S2, the electroless plating is performed on the catalytic metal layer 20 by electroless plating using a plating bath 40 of a metal 34 having conductivity. Further, following the electroless plating step S21, an electroless plating step S21 or an electrolytic plating step S22 using another plating metal 34 may be performed in order to form the metal layer 22 in a laminated manner. Thus, the metal layer 2
By forming 2 as a laminate of a plurality of metals 34, it is possible to achieve higher durability and electrical conductivity.
The thickness of the metal layer 22 is preferably about 1 to 100 μm. If the metal layer 22 is too thick, the manufacturing time and the manufacturing cost increase, and if it is too thin, the desired function cannot be performed.

The desired roller 10 can be obtained by the pretreatment step S1 and the conductive step S2 performed so far. In the finishing step S3 that is finally performed, the roller 10 is washed and dried.

[0032]

Second Embodiment The roller 10 according to the first embodiment described above is
Although the physical properties that can achieve the purpose of the present application are sufficiently secured,
Since the metal layer 22 is formed on the entire outer peripheral surface of the elastic layer 14, cracks may occur in the metal layer 22 from both ends of the elastic layer 14 during long-term use. This crack is considered to be due to the fact that a greater force is applied to both ends than the other portions when the elastic layer 14 is deformed, and the following measures are adopted to avoid this. After forming the metal layer 22 on the entire outer surface of the elastic body layer 14,
The metal layer 22 on the outer peripheral surface is cut off by a predetermined length from both ends and removed. The metal layers 22 are formed not only on the outer peripheral surface of the elastic layer 14 but also on both ends.

However, in the above countermeasures, FIGS.
As shown in the figure, the following difficulties were confirmed. A portion having a predetermined length from both ends of the metal layer 22 is cut out by pressing a blade or the like against the metal layer 22 from the outer peripheral surface (FIG. 5A). At the time of this pressing, the metal layer 2
2 is applied to the elastic layer 14 and the elastic layer 14 is dented and deformed (FIG. 5B). Due to this deformation, cracks occur before the metal layer 22 is cut (FIG. 5C). The metal layers 22 formed on both ends are formed on the shaft 12.
However, it does not deform in the direction perpendicular to this axial direction, that is, in the direction perpendicular to the outer peripheral surface of the elastic layer 14. Therefore, the roller 10 having the metal layer 22 formed so as to wrap around both ends of the elastic layer 14 does not cause a problem under no pressure (FIG. 6A). Smooth deformation upon biting becomes difficult (see FIG. 6B).

In order to avoid these points, as shown in FIG. 7, it has been confirmed that a laminated roller in which exposed portions 24 are provided near both ends of the elastic layer 14 and a method of manufacturing the same are suitable. . That is, the exposed portion 24 on which the conductive coating layer 16 is not formed has a basic structure similar to that of the first embodiment described above, and is provided near the both ends of the elastic layer 14.
Are provided respectively. At the time of manufacture, as shown in FIG. 8 and FIG. 9, the resin application step S121 and the catalyst adsorption step S122 (primer application step S12) for forming the resin layer 18 and the catalyst metal layer 20, respectively, and the metal layer 22
And a plating step S21 for depositing a metal layer 20, a first masking jig 42 corresponding to the primer application step S12 for forming the resin layer 18 and the catalyst metal layer 20, and a conduction step S2 for forming the metal layer 20, respectively. Second
This is a method using a masking jig 44.

Specifically, first, the elastic layer 14 is formed on the shaft 12 in the same manner as in the first embodiment (elastic layer forming step S11 (see FIG. 9A)). When performing the resin applying step S12 and the catalyst adsorbing step S21 (primer applying step S12), the first masking jig 42 is used on both ends of the elastic layer 14 and an outer peripheral surface of about 1 to 5 mm from the both ends. Masking (Fig. 9
(b) and FIG. 9 (c)). The resin layer 18 and the catalyst metal layer 20 are masked by the jig 42.
Is not applied, the exposed portion 24 where the elastic layer 14 is exposed to the outside.
Is provided. At the time of the electroless plating step S21 for applying the next metal layer 22, a second masking jig 44 is attached on the exposed portion 24 to further perform masking (FIG. 9D).
And FIG. 9 (e)). Since the resin layer 18 is not formed on the exposed portion 24 and the catalyst metal layer 20 is hardly formed, the attachment of the second masking jig 44 is not essential. By finally performing the finishing step S3,
The roller 10 is completed. Note that, as described above, the first resin layer 18 and the like are manufactured in a separate process, so that the first
If the masking jig 42 is not required, the catalyst is adsorbed by masking using the second masking jig 44 in step S122.
And the electroless plating step S21 may be performed.

Preferred experimental examples of the present invention are described below, but the present invention is not limited to these experiments.

[0037]

FIRST EXPERIMENTAL EXAMPLE A solid rod-like body obtained by applying electroless nickel plating to free-cutting steel having a diameter of 6 mm was used as a shaft.

As a pretreatment step, an elastic body applying step: JIS A hardness 40 as an elastic body
Was formed into a tube shape, attached to the shaft, and then polished to an outer diameter of φ19 and a length of 220 mm for the elastic portion. Primer application step (resin application step): First, the exposed portion of the shaft, both ends of the elastic body and a range of 2 mm from the end are brought into close contact with a first masking jig for a primer made of an olefin-based thermoplastic elastomer. Cover. Next, a moisture-curable modified silicone resin (product name Super X No. 8)
008; Cemedine) in xylene to give a solid content of 1
One part of conductive carbon black (product name Ketjen Black EC; manufactured by Lion) was added to 100 parts by weight of the 0% by weight solution to prepare a resin solution. This was spray-painted using a spray gun and dried to form a resin layer having a thickness of about 10 × 10 ⁻⁶ m on the surface of the silicone rubber roller. At this stage, the resistance between the shaft and the surface was 1 × 10 ⁵ Ω. Primer application stage (catalyst adsorption stage): a surfactant bath for promoting catalyst adsorption (product name Conditioner K; manufactured by Okuno Pharmaceutical Co., Ltd.)
(ml / L) at 25 ° C. for 3 minutes,
Washed with water. Next, in order to prevent decomposition of the catalyst bath,
Immerse in 5% 180ml / L pre-dip bath for 1 minute,
Subsequently, a catalyst bath containing a chloride complex of palladium and tin as a main component (product name Catalyst C;
ml / L and 35% hydrochloric acid 200ml / L) at 25 ° C
Immerse for 3 minutes. After washing with water, an accelerator bath (product name: Accelerator X; manufactured by Okuno Pharmaceutical Co., Ltd.) was used to remove tin oxide and expose metal palladium to the resin surface.
L and 98% sulfuric acid 100 ml / L) at 25 ° C. for 5 minutes, and then sufficiently washed with water.

Electroless plating step as a conductive process: First, an elastic body was attached near both ends.
Remove the first masking jig and replace it with the same
A second masking jig for plating was attached closely. Next
To electroless nickel (product name Chemical Nickel HR-T: Okuno)
At a temperature of 30 ° C. using a standard concentration solution of
Plating was performed for 10 minutes. Electroplating step: Next, activating solution (product name
(Okino Pharmaceutical Co., Ltd.) for 30 minutes at a temperature of 25 ° C.
And strike nickel plating bath (nickel sulfate
150 g / L, ammonium chloride 30 g / L and boric acid
3.0 g / L) at a temperature of 30 ° C. and a current intensity of 100
A / m^TwoPlating for 4 minutes under the conditions of
It secures conductivity to prevent contact burns. And
Bright copper sulfate bath (product name UBAC-EPII: Ebara Ezira)
25 ° C. in temperature, current intensity 4
00A / m^TwoPlating for 15 minutes under the conditions of
× 10 ^-6Form a copper metal layer with a thickness of m
Le # 66 (made by EBARA Agelight) at standard temperature
30 ° C, current intensity 400A / m^TwoPlating for 3 minutes
And 2.5 × 10^-6m thick nickel metal layer
Formed and laminated.

In the finishing step, the roller surface was honed using a liquid honing machine (product name LH-10DT; manufactured by Fuji Seiki Seisakusho) using alumina particles (product name Fuji White # 220; manufactured by Fuji Seiki Seisakusho). The treatment was performed under the conditions of a volume fraction of alumina in the treatment liquid of 15% and a discharge pressure of 3.9 × 10 ⁵ Pa to adjust the surface roughness (Rz) to 5 × 10 ⁻⁶ m. It was confirmed that this roller was suitable as a developing roller.

[0041]

SECOND EXPERIMENTAL EXAMPLE A solid rod-like body formed by electroless nickel plating on free-cutting steel having a diameter of 8 mm was used as a shaft.

As a pretreatment step, an elastic body applying step: As an elastic body, an ASKER hardness of 40
Using a conductive EPDM rubber sponge of C, it was formed into a tube shape and attached to the shaft, and then the outer diameter was polished to a diameter of φ19 and a length of 220 mm. Primer application step (resin application step): First, the exposed portion of the shaft, both ends of the elastic body, and a range of 2 mm from the end are tightly adhered with a first masking jig for a primer made of an olefin-based thermoplastic elastomer. Cover. Next, an aqueous polyurethane dispersion (product name: Superflex E-20)
00: 100 parts by weight of Daiichi Kogyo Seiyaku Co., Ltd .: solid content 50%), 10 parts of a crosslinking agent (product name Denacol EX-614B: manufactured by Nagase Kasei Kogyo) and conductive carbon black (product name Ketjen Black EC: 5 parts (manufactured by Lion) were sufficiently mixed to obtain a latex resin. And it applied with the roll coater so that the cell of the elastic body might be filled, and was dried. At this stage, the resistance between the shaft and the surface is 1
× 10 ⁵ Ω. Primer application stage (catalyst adsorption stage): palladium chloride
(PdCl ₂ ) 0.089 g / L and sodium chloride (NaC
l) 0.146 g / L of a pure aqueous solution containing 0.1 g / L of stearyltrimethylammonium chloride (product name Cotamine 86P Conc.)
By vigorously stirring while adding a solution in which 0.076 g of sodium borohydride (NaBH ₄ ) was previously dissolved in a small amount of pure water, a black-brown transparent palladium colloid catalyst solution was prepared. The palladium colloid catalyst solution was sufficiently applied by spray coating on the roller obtained through the above-described steps, and then dried at a temperature of 100 ° C. for 30 minutes in a high temperature oven capable of setting the temperature.

Electroless plating step as a conductive process: First, remove the first masking jig attached near both ends of the elastic body, and instead attach a second masking jig of the same shape for plating in close contact. Was. Next, using a standard concentration solution of electroless nickel (product name: Chemical Nickel HR-T: manufactured by Okuno Pharmaceutical Co., Ltd.), plating was performed at a temperature of 30 ° C. for 10 minutes. Electroplating step: Then activated using an activating liquid (product name: Topsan: manufactured by Okuno Pharmaceutical Co., Ltd.) and using a strike nickel plating bath (nickel sulfate 150 g / L, ammonium chloride 30 g / L and boric acid 30 g / L) Then, plating was performed for 4 minutes under the conditions of a temperature of 30 ° C. and a current intensity of 100 A / m ² , thereby plating nickel to secure conductivity for preventing contact burn. And bright copper sulfate bath (product name UBAC
-EP plate: made of EBARA Agelite: standard blending), plating was performed for 15 minutes at a temperature of 25 ° C. and a current intensity of 400 A / m ² , and a copper metal having a thickness of 12 × 10 ⁻⁶ m was obtained. A layer is formed, and bright nickel # 66 (manufactured by Ebara Agelite)
30 ° C., current intensity 400 A / m ^{2 in} temperature
Plating for 15 minutes under the condition of 2.5 × 10 ^-6
An m-thick nickel metal layer was formed and laminated.

As a finishing step, washing and drying were performed. It was confirmed that this roller was suitable as a roller for both driving and electrode of the intermediate transfer belt.

[0045]

THIRD EXPERIMENTAL EXAMPLE As a shaft, a solid rod-like body formed by electroless nickel plating on a free-cutting steel having a diameter of 6 mm similar to that of Experimental Example 1 was used.

As a pretreatment step, an elastic body applying step: Asker C hardness as an elastic body
40 conductive urethane foam is formed into a tube, attached to the shaft, and then the outer diameter is polished to make the elastic part have a diameter of 18.2 and a length of 220 mm.
(Product name Endur C-LE; manufactured by Rogers INOAC; shaft-surface resistance value 1 × 10 ⁷ Ω) was used. Primer application step (resin application step): conductive ABS resin
(Extruded grade ABS resin Product name Psycholac EPX; Ube Saikon 100 parts by weight conductive carbon black Product name Ketjen Black EC; Lion
5 parts) is extruded to a length of 220 mm,
A tube having an outer diameter of 18 mm and a thickness of 100 × 10 ⁻⁶ m was formed. The urethane foam roller is placed in a vacuum container under a reduced pressure of about 10 Pa to shrink the diameter, and the thickness is 6.
Reduce 5 mm by about 3 mm. In this state, the urethane foam roller is inserted into the ABS tube to recover the shape, so that the length is 220 mm and the diameter is 18.0 mm.
A roller comprising an elastic layer and an ABS resin layer was obtained.
A portion of the end face where the urethane foam was exposed was coated with a modified silicone sealing material (product name: POS seal; manufactured by Cemedine) so as to have a thickness of about 1 mm, taking care not to generate pinholes. At this stage, the resistance between the shaft and the surface was 1 × 10 ⁵ Ω. Primer application step (catalyst adsorption step): The exposed portion of the shaft, both ends of the elastic body, and a range of 2 mm from the ends are tightly covered with a second masking jig for plating made of an olefin-based thermoplastic elastomer. Immersion in a degreasing bath (product name A-screen A-220; Okuno Pharmaceutical 50 g / L) at 50 ° C. for 10 minutes, washing with water, and then an air pocket prevention bath (product name Placon; Okuno Pharmaceutical 10 ml / L) And 9
(Composed of 8% sulfuric acid 10 ml / L) at 50 ° C for 2 minutes, washed with water, and finally dispersed in an etching bath composed of chromic anhydride 400g / L and 98% sulfuric acid 400g / L at 68 ° C for 10 minutes. The resulting rubber phase was dissolved to form fine irregularities on the surface. The highly concentrated etchant adhering to the etched roller is recovered in a recovery bath, and is repeatedly washed with water. Further, 25% hydrochloric acid is added to a neutralization bath made of 50 ml / L.
Immersion in a 35% 180 ml / L pre-dip bath for 1 minute to prevent decomposition of the catalyst bath described later, and then a catalyst mainly composed of a palladium / tin chloride complex. Bath (Catalyst C; Okuno Pharmaceutical 30ml / L and 35% hydrochloric acid 200ml / L)
) At 25 ° C for 3 minutes, washing with water, and finally removing tin oxide to expose metal palladium on the resin surface (Accelerator X; product of Okuno Pharmaceutical 0.5g / L and 98 % Sulfuric acid (100 ml / L) at 25 ° C. for 5 minutes, and then sufficiently washed with water.

Electroless plating step: a standard concentration solution of electroless nickel (product name: Chemical Nickel HR-T; manufactured by Okuno Pharmaceutical Co., Ltd.) is adjusted at 0 ° C. while the second masking jig is attached. At a temperature of 10 minutes. Electroplating step: Then activated using an activating liquid (product name: Topsan: manufactured by Okuno Pharmaceutical Co., Ltd.) and using a strike nickel plating bath (nickel sulfate 150 g / L, ammonium chloride 30 g / L and boric acid 30 g / L) Then, plating was performed for 4 minutes under the conditions of a temperature of 30 ° C. and a current intensity of 100 A / m ² , thereby plating nickel to secure conductivity for preventing contact burn. And bright copper sulfate bath (product name UBAC
-EP plate: made of EBARA Agelite: standard blending), plating was performed for 15 minutes at a temperature of 25 ° C. and a current intensity of 400 A / m ² , and a copper metal having a thickness of 12 × 10 ⁻⁶ m was obtained. A layer is formed, and bright nickel # 66 (manufactured by Ebara Agelite)
30 ° C., current intensity 400 A / m ^{2 in} temperature
Plating for 15 minutes under the condition of 2.5 × 10 ^-6
An m-thick nickel metal layer was formed and laminated.

As a finishing step, washing and drying were performed. It was confirmed that this roller was suitable as a roller for both driving and electrode of the intermediate transfer belt.

[0049]

As described above, according to the laminated roller and the method of manufacturing the same according to the present invention, the elastic layer capable of securing a large contact area with a low nip pressure, the mechanical durability and the desired electric power Since it is possible to easily manufacture a roller in which a metal layer having conductivity is uniformly and closely laminated,
An effect having both advantages of the elastic body and the metal is obtained.

Also, by using a jig, by providing an exposed portion near the both ends of the roller where a metal layer is not formed, peeling of the metal layer can be efficiently avoided, and the surface smoothness of the metal layer can be maintained. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a side view partially showing a cross section of a lamination roller according to a first embodiment of the present invention.

FIG. 2 is a side view partially showing a cross section of the lamination roller according to the present invention.

FIG. 3 is a flowchart illustrating a method of manufacturing a laminated roller according to the first embodiment of the present invention.

FIG. 4 is a process chart showing a method for manufacturing a laminated roller according to the first embodiment of the present invention.

FIG. 5 is a side view showing, in partial cross section, a state in which the vicinity of an end of the metal layer of the lamination roller according to the first embodiment of the present invention is cut.

FIG. 6 is a partial cross-sectional side view showing a state in which a laminated roller in which a metal layer is deposited to both ends of an elastic body layer is used.

FIG. 7 is a side view partially showing a cross section of a lamination roller according to a second embodiment of the present invention.

FIG. 8 is a flowchart illustrating a method of manufacturing a laminated roller according to a second embodiment of the present invention.

FIG. 9 is a process chart showing a method for manufacturing a laminated roller according to a second embodiment of the present invention.

DESCRIPTION OF SYMBOLS 12 Shaft 14 Elastic layer 16 Conductive coating layer 18 Resin layer 20 Catalyst metal layer 22 Metal layer 24 Exposed portion 40 First masking jig 42 Second masking jig

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03G 15/16 103 G03G 15/16 103 4K022 15/20 101 15/20 101 F-term (Reference) 2H003 CC05 2H032 AA05 2H033 BB14 BB15 BB30 BB31 2H077 AC04 AD06 FA21 FA25 3J103 AA02 AA15 AA51 BA41 FA02 FA13 FA15 FA30 GA57 GA58 GA60 HA03 HA12 HA20 HA31 HA41 HA47 HA48 4K022 AA13 AA14 AA15 AA16 AABA A18 AA ABA AA ABA AA AA AA AA A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A B A A A A A A A A A A A A B A A A A A A A A A A A A B A A A A A A A A A BA21 BA25 BA28 BA36 CA02 CA06 CA08 CA20 CA21 DA01

Claims (15)

[Claims] An elastic layer (14) formed in a cylindrical shape around a shaft (12) serving as a core material of a roller (10), and a conductive coating provided on an outer peripheral surface of the elastic layer (14). The conductive coating layer (16) is made of a selected specific metal (34), the outermost metal layer (22), and the elastic layer (14). Existing on the outer peripheral surface of the metal (34) and the metal layer
A laminated roller comprising a catalyst metal (32) for precipitating (22). 2. The laminated roller according to claim 1, wherein the catalyst metal (32) is present in a layer on the outer peripheral surface of the elastic body (14) via a resin layer (18). 3. The laminated roller according to claim 1, wherein the catalyst metal (32) is contained in a dispersed state in the resin layer (18). 4. The resin layer (18) is a moisture-curable resin, wherein the moisture-curable resin is selected from a moisture-curable modified silicone resin or cyanoacrylate.
Or the laminated roller according to 3. 5. The laminated roller according to claim 2, wherein the resin layer is made of a synthetic resin latex such as urethane. 6. The laminated roller according to claim 2, wherein the resin layer is made of a synthetic resin that can be plated, such as an ABS resin. 7. The exposure device according to claim 1, wherein an exposed portion (24) for preventing deposition of a metal layer (22) is provided near both ends of the elastic layer (14). Laminated rollers. 8. A cylindrical elastic layer (14) is formed around a shaft (12) serving as a core material of a roller (10), and a resin layer (18) is formed on an outer surface of the elastic layer (14). By forming a catalyst metal (32) for precipitating the selected specific metal (34) on the resin layer (18), and then performing a plating process, the catalyst metal (32) is coated with the metal ( 34. A method for producing a laminated roller, wherein 34) is deposited to form a metal layer (22). 9. A cylindrical elastic layer (14) is formed around a shaft (12) serving as a core material of a roller (10), and a selected specific layer is formed on an outer surface of the elastic layer (14). Metal (3
Forming a resin layer (18) containing the catalyst metal (32) in which the catalyst metal (32) for depositing 4) is dispersed, and then performing plating to precipitate the metal (34) on the catalyst metal (32), A method for manufacturing a laminated roller, wherein a layer (22) is formed. 10. The laminated roller according to claim 8, wherein the resin layer is a moisture-curable resin, and the moisture-curable resin is selected from a moisture-curable modified silicone resin or cyanoacrylate. Production method. 11. The method according to claim 8, wherein the resin layer is made of a synthetic resin latex such as urethane. 12. A shaft (12) serving as a core material of a roller (10).
Forming a columnar elastic layer (14) around the periphery of the elastic layer (14); forming a resin layer (18) of a synthetic resin that can be plated on the outer surface of the elastic layer (14); After subjecting the surface to a roughening treatment, a catalytic metal layer (20) exhibiting catalytic activity with respect to the selected specific metal (34) is provided, and then subjected to a plating treatment, whereby the catalytic metal layer ( 20. A method for manufacturing a laminated roller, wherein the metal (34) is deposited on the layer (20) to form a metal layer (22). 13. The method for manufacturing a laminated roller according to claim 12, wherein the plateable synthetic resin is, for example, an ABS resin. 14. The shaft (12) and the elastic layer (14).
A first masking jig is provided near both ends exposed to the outside of the
The resin layer (18) and the catalyst metal layer (20) are formed in a state covered by (42), whereby the exposed portion (24) where the resin layer (18) and the catalyst metal layer (20) are not formed is formed. The metal layer (22) is formed in a state where the exposed portion (24) is covered by a second masking jig (44), whereby the exposed portion (2
4. The method according to claim 1, wherein the metal layer is not deposited on the fourth layer.
4. The method for manufacturing a laminated roller according to any one of the above items 3. The exposed portion (24) is provided on the elastic layer (14).
15. The method for manufacturing a laminated roller according to claim 14, wherein the roller is provided at least 1 mm or more from both ends of the outer surface and both ends of the outer surface.